kopia lustrzana https://github.com/espressif/esp-idf
94 wiersze
2.9 KiB
C
94 wiersze
2.9 KiB
C
/*
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* SPDX-FileCopyrightText: 2024 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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/**
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* This file is a target specific for DAC DMA peripheral
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* Target: ESP32-S2
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* DAC DMA peripheral (data source): SPI3 (i.e. use SPI DMA to transmit data)
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* DAC DMA interrupt source: SPI3
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* DAC digital controller clock source: DIG_SARADC_CLK (root clock: APB or APLL)
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*/
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#include "hal/spi_types.h"
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#include "hal/spi_ll.h"
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#include "esp_private/spi_common_internal.h"
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#include "esp_private/adc_dma.h"
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#define ADC_DMA_SPI_HOST SPI3_HOST
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#define ADC_DMA_INTR_MASK SPI_LL_INTR_IN_SUC_EOF
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static IRAM_ATTR void adc_dma_intr_handler(void *arg)
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{
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adc_continuous_ctx_t *ctx = (adc_continuous_ctx_t *)arg;
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bool need_yield = false;
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bool conversion_finish = spi_ll_get_intr(ctx->adc_dma.adc_spi_dev, ADC_DMA_INTR_MASK);
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if (conversion_finish) {
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spi_ll_clear_intr(ctx->adc_dma.adc_spi_dev, ADC_DMA_INTR_MASK);
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intptr_t desc_addr = spi_dma_ll_get_in_suc_eof_desc_addr(ctx->adc_dma.adc_spi_dev, ctx->adc_dma.spi_dma_ctx->rx_dma_chan.chan_id);
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ctx->rx_eof_desc_addr = desc_addr;
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need_yield = ctx->adc_intr_func(ctx);
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}
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if (need_yield) {
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portYIELD_FROM_ISR();
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}
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}
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esp_err_t adc_dma_intr_event_init(adc_continuous_ctx_t *adc_ctx)
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{
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return (esp_intr_alloc(spicommon_irqdma_source_for_host(ADC_DMA_SPI_HOST), ESP_INTR_FLAG_IRAM, adc_dma_intr_handler,
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(void *)adc_ctx, &adc_ctx->adc_dma.dma_intr_hdl));
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}
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esp_err_t adc_dma_init(adc_dma_t *adc_dma)
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{
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esp_err_t ret = ESP_OK;
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//ADC utilises SPI3 DMA on ESP32S2
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bool spi_success = false;
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spi_success = spicommon_periph_claim(ADC_DMA_SPI_HOST, "adc");
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if (spi_success != true) {
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return ESP_FAIL;
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}
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ret = spicommon_dma_chan_alloc(SPI3_HOST, SPI_DMA_CH_AUTO, &(adc_dma->spi_dma_ctx));
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if (ret != ESP_OK) {
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return ret;
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}
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adc_dma->adc_spi_dev = SPI_LL_GET_HW(ADC_DMA_SPI_HOST);
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return ESP_OK;
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}
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esp_err_t adc_dma_deinit(adc_dma_t adc_dma)
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{
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esp_intr_free(adc_dma.dma_intr_hdl);
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spicommon_dma_chan_free(adc_dma.spi_dma_ctx);
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spicommon_periph_free(ADC_DMA_SPI_HOST);
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return ESP_OK;
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}
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esp_err_t adc_dma_start(adc_dma_t adc_dma, dma_descriptor_t *addr)
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{
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spi_ll_clear_intr(adc_dma.adc_spi_dev, ADC_DMA_INTR_MASK);
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spi_ll_enable_intr(adc_dma.adc_spi_dev, ADC_DMA_INTR_MASK);
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spi_dma_ll_rx_start(adc_dma.adc_spi_dev, adc_dma.spi_dma_ctx->rx_dma_chan.chan_id, (lldesc_t *)addr);
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return ESP_OK;
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}
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esp_err_t adc_dma_stop(adc_dma_t adc_dma)
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{
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spi_ll_disable_intr(adc_dma.adc_spi_dev, ADC_DMA_INTR_MASK);
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spi_ll_clear_intr(adc_dma.adc_spi_dev, ADC_DMA_INTR_MASK);
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spi_dma_ll_rx_stop(adc_dma.adc_spi_dev, adc_dma.spi_dma_ctx->rx_dma_chan.chan_id);
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return ESP_OK;
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}
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esp_err_t adc_dma_reset(adc_dma_t adc_dma)
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{
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spi_dma_ll_rx_reset(adc_dma.adc_spi_dev, adc_dma.spi_dma_ctx->rx_dma_chan.chan_id);
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return ESP_OK;
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}
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